Metal wood club

Abstract

A golf club head is provided having a body and a face, with a slot in a perimeter region of the body of the club head adjacent the face. The slot increases the flex of the hitting surface on impact with a golf ball, thereby increasing the speed with which the ball rebounds off the hitting face and increases the overall distance the ball is hit. The slot preferably moves the sweet spot of the hitting face a distance X from the face center of the hitting face. The slot may be partially or wholly filled with an insert.

I claim: 
     
       1. A golf club head, comprising:
 a hollow body having a perimeter region and a face, the hollow body defining an inner cavity, the face having a geometric face center and an area of maximum coefficient of restitution, 
 wherein the hollow body comprises a slot disposed in the perimeter region forming an opening into the inner cavity of the hollow body, 
 an elastomeric insert disposed in the slot, and at least partially filling the slot, wherein an interior surface of the elastomeric insert is exposed to the inner cavity and an exterior surface of the elastomeric insert is exposed to an exterior of the golf club head, wherein the elastomeric insert has a protrusion extending outward from a side wall of the elastomeric insert, and wherein the protrusion extends into a groove in a wall of the slot so that the insert is kept within the slot, and wherein the groove is not exposed to the exterior of the golf club head, 
 wherein the area of maximum coefficient of restitution is disposed within a zone on the face and the area of maximum coefficient of restitution is disposed less than 20 mm from the geometric face center, and wherein the maximum coefficient of restitution is at least about 0.82. 
 
     
     
       2. The golf club head of  claim 1 , wherein the protrusion is disposed on the side wall so that it is spaced from the interior surface and spaced from the exterior surface of the elastomeric insert. 
     
     
       3. The golf club head of  claim 1 , wherein the area of maximum coefficient of restitution is disposed less than 10 mm from the geometric face center. 
     
     
       4. The golf club head of  claim 3 , wherein the area of maximum coefficient of restitution is disposed within 2 mm of the geometric face center. 
     
     
       5. The golf club head of  claim 1 , wherein the slot has a width of greater than 1 mm. 
     
     
       6. The golf club head of  claim 1 , wherein the slot has a length of greater than 15 mm. 
     
     
       7. The golf club head of  claim 1 , wherein the slot provides a space in the body, such that the face flexes when the face impacts a golf ball. 
     
     
       8. The golf club head of  claim 1 , wherein the face defines a face plane and the slot is disposed less than 30 mm from the face plane. 
     
     
       9. A golf club head, comprising:
 a hollow body having a perimeter region and a face, the hollow body defining an inner cavity, the face having a geometric face center and an area of maximum coefficient of restitution, 
 wherein the hollow body comprises a slot forming an opening into the inner cavity of the hollow body, 
 wherein the slot is formed between a portion of a sole of the hollow body and a portion of the perimeter region, and 
 an elastomeric insert disposed in the slot, and at least partially filling the slot, wherein an interior surface of the elastomeric insert is exposed to the inner cavity and an exterior surface of the elastomeric insert is exposed to an exterior of the golf club head, wherein the elastomeric insert has a protrusion extending outward from a side wall of the elastomeric insert, and wherein the protrusion extends into a groove in a wall of the slot so that the insert is kept within the slot, and wherein the groove is not exposed to the exterior of the golf club head, 
 wherein the area of maximum coefficient of restitution is disposed within a zone on the face and wherein the area of maximum coefficient of restitution is disposed less than 20 mm from the geometric face center, and wherein the maximum coefficient of restitution is at least about 0.82. 
 
     
     
       10. The golf club head of  claim 9 , wherein the protrusion is disposed on the side wall so that it is spaced from the interior surface and spaced from the exterior surface of the elastomeric insert. 
     
     
       11. The golf club head of  claim 9 , wherein the area of maximum coefficient of restitution is disposed less than 10 mm from the geometric face center. 
     
     
       12. The golf club head of  claim 11 , wherein the area of maximum coefficient of restitution is disposed within 2 mm of the geometric face center. 
     
     
       13. The golf club head of  claim 9 , wherein the slot is substantially filled with an elastomeric material that is exposed to the inner cavity of the hollow body. 
     
     
       14. The golf club head of  claim 9 , wherein the slot has a width of greater than 1 mm. 
     
     
       15. The golf club head of  claim 9 , wherein the slot has a length of greater than 15 mm. 
     
     
       16. The golf club head of  claim 9 , wherein the slot provides a space in the body, such that the face flexes when the face impacts a golf ball. 
     
     
       17. The golf club head of  claim 9 , wherein the face defines a face plane and the slot is disposed less than 30 mm from the face plane.